Since 2000, the number of hate organizations has increased by 69%, and there are currently 1,018 active groups in the U.S. A gunman who killed six people inside a Sikh temple in Wisconsin was a member of a racist skinhead group, one of the major sects of white supremacist organizations.

Amardeep Kaleka, son of the president of the Sikh Temple of Wisconsin, center, comforts others Monday in Oak Creek, Wis.

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Page, 40, was identified by police Monday as the gunman who killed six worshipers Sunday morning at a Sikh Temple in Oak Creek, Wis. Local and federal authorities said they were investigating whether the shooting was an act of domestic terrorism.

The bald, heavy man decorated in tattoos and shot dead in an exchange with police played in hate bands and used hate-filled heavy-metal music to recruit white supremacists to the cause. Page played at gatherings around the country including Hammerfest, the biggest festival of the obscure neo-Nazi genre, the "Lollapalooza of hate," according to the Southern Poverty Law Center.

Though police are still seeking clues as to what, specifically, triggered the rampage, Page had immersed himself in a skinhead music scene that is small yet virulent and off the radar screen of most Americans. Even so, the loosely aligned movement is active enough to alarm those who monitor hate groups and believe their activity is on the rise.

"There is an entire underworld out there of white supremacist music that the public basically has no idea of," says Mark Potok, senior fellow at the Montgomery, Ala.-based center, which tracks hate groups.

"The lyrics to the songs these bands sing could not be printed in any newspaper in this country. They are incredibly vile. They call for the murder of all Jews, all black people. When we say it's hate music, we're not kidding," Potok said.

Teresa Carlson, the FBI special agent in charge, confirmed that investigators are probing Page's ties to white supremacy groups.

Just weeks after the nation reeled in the horror of a gunman's massacre in an Aurora, Colo., theater, a familiar ritual was taking place Monday night as Sikhs and non-Sikhs gathered at a Brookfield temple in suburban Milwaukee to show their respect for those killed across town while merely practicing their faith.

Indy Trewal, 28, said it is time for healing. "We don't have any anger," he said. "It is time for peace."

Lori and Bill Raczynski made their first visit to the Sikh temple because they were horrified by the shootings and wanted to share their pain with those most affected. "This violence has got to stop," she said.

Three people wounded in the shooting remain in critical condition, including one of the first Oak Creek police officers on the scene, Lt. Brian Murphy, 51, who was shot repeatedly while attending to a victim. Police said an officer shot and killed Page outside the temple.

Demoted, discharged

Page grew up in Colorado and enlisted in the Army in 1992, where he served at Fort Bragg in North Carolina and other U.S. posts, according to Army documents. He worked in psychological operations. He plunged into the white supremacist music scene after he was demoted and discharged from military service in 1998.

The Army did not disclose what caused him to be disciplined. The Associated Press, citing unnamed defense officials, said he was demoted for getting drunk while on duty and going AWOL.

FBI and local authorities converged Monday on Page's rented home in the Milwaukee suburb of Cudahy, scouring it for clues.

They reported finding more ammunition and weapons in his apartment. Federal ATF agent Bernard Zapor said the 9mm handgun recovered at the temple had been purchased legally.

In 2011, Page wrote an e-mail — with a subject line reading, "No registering of long guns" — to the U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives: "Wake Up!!!! No more restrictions on law abiding gun owners! These restrictions do nothing about the criminals they are meant to affect. Why punish and render defenseless the very people that deserve to be protected while HELPING the offenders with such laws? The only other use for such laws is for government to gain control over the people. This is America, and I AM THE GOVERNMENT, not you! Remember who you work for, and your oath!"

Page is the fifth person on the Southern Poverty Law Center's tracking list who has been tied to crimes in recent years. Among the others was James Von Brunn, who was charged with killing a black security guard at the U.S. Holocaust Museum in Washington, D.C., in 2009. He died awaiting trial.

Behind the music

Page was a guitarist, bassist, lyricist and singer for a series of bands, and the Internet is littered with pictures of him and his bandmates. He looks like others in his crowd — bald, heavy, white men bearing tattoos that are emblems of a racist world.

He founded bands and joined in others, with names such as Definite Hate, End Apathy and Youngland that were affiliated with Hammerskins, one of the oldest and largest skinhead organizations in the country, says Mark Pitcavage, director of research for the Anti-Defamation League, which tracks such groups.

The Hammerskins promote bands and hold an annual music festival, called Hammerfest, at private venues around the country. This year it was in Richmond on St. Patrick's Day.

Label 56, a Maryland-based record label specializing in the genre, posted a statement on its website distancing itself from Page and saying it was halting sale of music by his band End Apathy.

"Please do not take what Wade did as honorable or respectable and please do not think we are all like that," the statement said. "We have worked hard over the years to promote a positive image and have posted many articles encouraging people to take a positive path in life, to abstain from drugs, alcohol, and just general behavior that can affect one's life negatively."

In an interview with Label 56, Page once said of his lyrics: "The topics vary from sociological issues, religion, and how the value of human life has been degraded by being submissive to tyranny and hypocrisy that we are subjugated to."

It is a type of music that devotees of more mainstream metal music — with graphic names such as Cannibal Corpse and As I Lay Dying — distance themselves from.

Bill Werde, editorial director of Billboard, which follows the music business, said the genre is tiny in terms of sales, though the Internet and digital distribution have opened new avenues for the music to be heard.

"Hate music is definitely fringe," Werde says. "You're not seeing these groups selling many albums or selling albums where the mainstream buys music."

Albums by headlining acts at the last Hammerfest have not surpassed sales of 500 each, but totals are likely higher given music is sold in non-traditional outlets not tallied by Nielsen SoundScan.

A 'hero' died

In Wisconsin, Kurt Weins said Page moved in with him June 23, responding to an online ad for a roommate.

"He seemed pretty calm. He didn't seem like the type to raise his voice," Weins said.

Just weeks later, on July 16, Page moved out and into a duplex across the street. A neighbor, Peter Hoyt, remembers Page having a "9/11" tattoo on an arm.

"I can't believe it was him," Hoyt said.

At the temple, the gunman took aim at a crowd filled with Sikh immigrants and their families who gather weekly to worship. The religion was started in India and the Punjab, which straddles the border with Pakistan.

In the United States, the religion is most known for the colorful turbans and long beards that men commonly wear — symbols that Sikh activists say has caused them to be confused with Muslims and targeted as if they were Islamist extremists.

Satwant Kaleka, 65, founder and president of the temple, died in the shooting. He was among four priests killed.

"I feel a fire inside me," his son, Amardeep Kaleka, 34, said Monday morning. He said his mother, Satpal, hid in a closet during the attack and survived.

Amardeep Kaleka said his father, who had three grandchildren, came to the USA in 1982 with $30 in his pocket. He said he was found with a knife just 2 feet from his body, indicating he was fighting off the shooter.

"My dad has always been a protector," he said. "He was a hero yesterday."

Simran Kaleka, 24, a niece of Satwant Kaleka, said she was just "broken."

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